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 Forum index » DIY Hardware and Software » Microcontrollers and Programmable Logic
PIC-based fraktal synth
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oootini



Joined: Oct 15, 2007
Posts: 80
Location: ireland

PostPosted: Mon Sep 29, 2008 12:26 am    Post subject: Reply with quote  Mark this post and the followings unread

hey,
just a pitch shifting effect that adds minor and major harmonies to the signal...
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catweazle



Joined: Feb 25, 2008
Posts: 28
Location: germany
Audio files: 3

PostPosted: Mon Sep 29, 2008 2:42 am    Post subject: Reply with quote  Mark this post and the followings unread

@ootini:
very nice work!! I like that LEGO like case and I'm impressed about that
sound sample, sounds
If you can select more than 4 synths (5..Cool then you have the newest hex file. Synths 5..8 are not implemented yet.
Why learn C and roll your own? I recommend buying a cheap pic-programmer. Or the WinPIC800 (can prgram AVR and PIC)
If I get my prototype back, then I make a version for the C18 C-Compiler which is free.

Synths 1..4 should work,
synth 3 (step sequencer) : turn pot4, pitch for each step has to be fetched.
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oootini



Joined: Oct 15, 2007
Posts: 80
Location: ireland

PostPosted: Mon Sep 29, 2008 5:24 am    Post subject: Reply with quote  Mark this post and the followings unread

cheers catweazle. i do have a pic programmer, so maybe i will try and learn some C. don't hold your breath though Smile
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State Machine
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Joined: Apr 17, 2006
Posts: 2743
Location: New York
Audio files: 24

PostPosted: Mon Sep 29, 2008 3:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

oootini,

I like this. Made me want to add all sorts of sounds FX on top of it and build it up .... A remix perhaps !!! Cool A chip tune remix ...........

Bill
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oootini



Joined: Oct 15, 2007
Posts: 80
Location: ireland

PostPosted: Wed Oct 01, 2008 9:21 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey ho. I want to add a power supply connection to my picsynth. I have a couple of 9v effects pedal adapters, so I could use them without having to fuck with the existing pic synth power supply. Basically solder the connection thing in place of the 9v battery clip.

Only thing is, I don’t know what the little thing is called so I can order it. what are those little things called?
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yerpa58



Joined: Mar 08, 2008
Posts: 56
Location: Wisconsin
Audio files: 4

PostPosted: Fri Oct 03, 2008 11:17 am    Post subject: Reply with quote  Mark this post and the followings unread

They are called power jacks. Sometimes called barrel jacks. An example would be Digi-Key (digikey.com) part number CP-055D-ND, manufactured by CUI. Be sure to check the inside and outside diameters to match your parts.
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oootini



Joined: Oct 15, 2007
Posts: 80
Location: ireland

PostPosted: Mon Oct 06, 2008 4:54 am    Post subject: Reply with quote  Mark this post and the followings unread

yep, sorted. thanks
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akorbeti



Joined: Oct 30, 2008
Posts: 22
Location: Greece

PostPosted: Thu Oct 30, 2008 3:53 am    Post subject: shoeBox fraktalSynth Reply with quote  Mark this post and the followings unread

Hi all,

I have been watching this forum for some time but this is my first time
posting. It's my first time having something to show too Smile

I made the fraktal Synth and put it in a shoebox (hence the title). I have
some samples too.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

My next move will be to pass it through MC 909 and actually use it to make
a tune.

for now, the only sample I have made is here:

http://sites.google.com/site/diysynth/Home/CatweazlesFractalSynth.mp3

for more photos you can go to http://synth-diy.blogspot.com/2008/10/shoebox-fractalsynth.html

photos also here: http://picasaweb.google.com/akorbeti/DiySynth

My daughter whined a bit for taking her box but I just gave it some added
value.. It is still hers. I only play with it when she's asleep. She likes to
play with it! It's so easy! No rules Smile

I might consider making one for giving it as a present to our neighbour's
little boy.!! It's a wonderful idea (well, for children only Smile )



Thank you Catweazle!!!
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State Machine
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Joined: Apr 17, 2006
Posts: 2743
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PostPosted: Sat Nov 01, 2008 11:33 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
I have been watching this forum for some time but this is my first time
posting. It's my first time having something to show too Smile

I made the fraktal Synth and put it in a shoebox (hence the title). I have
some samples too.



Wow, great samples of the synth and thanks for all the pictures !!! Welcome to the forum and hope you are here to stay a while ! Very Happy

Bill ........
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yerpa58



Joined: Mar 08, 2008
Posts: 56
Location: Wisconsin
Audio files: 4

PostPosted: Sat Nov 01, 2008 12:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Wow, great samples of the synth and thanks for all the pictures !!! Welcome to the forum and hope you are here to stay a while !


I agree! That sample covers a lot of ground. I put up some cad pictures & a photo of my recently-completed fraktal synth. I added a one-watt amplifier and power switch. Now I have to practice playing it and see what it can do.

yerpa58http://www.reprolabs.com/fraktal_synth_1.htm

bleep!blorpblipblipblip
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State Machine
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Joined: Apr 17, 2006
Posts: 2743
Location: New York
Audio files: 24

PostPosted: Sat Nov 01, 2008 1:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
I agree! That sample covers a lot of ground. I put up some cad pictures & a photo of my recently-completed fraktal synth. I added a one-watt amplifier and power switch. Now I have to practice playing it and see what it can do.


Just wondering, with your Eagle .BRD files. Who are you using as your PCB house to process those files. I know that "PCB Pool" works with them but doing a quote with them did not beat EXPRESS PCB at all. Can you recommend any good, cheaper, PCB services that are compatible with the .BRD files?

Thanks and nice work on your end also sir. Very Happy

Bill
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yerpa58



Joined: Mar 08, 2008
Posts: 56
Location: Wisconsin
Audio files: 4

PostPosted: Mon Nov 03, 2008 11:40 am    Post subject: Reply with quote  Mark this post and the followings unread

I haven't used any services that take Eagle files directly. However, Eagle produces nice Gerber artwork and Excellon drill files, and I have sent these through BatchPCB (found on Sparkfun's site). I got very nice boards back from them, double-sided, silkscreened, solder-masked and plated through. Most PC board vendors can read these files.

For single-sided art, we plot quarter-panels full of PC boards onto clear film and send this film to Electronic Industries. (http://electronicindustries.net/. They charge about $125 for a 17" x 23" panel of PC boards. These are single-sided and drilled, sheared to size. No solder mask, no silkscreen. The company I work for sends in about a dozen of these per month, so I just snuck the fraktal synth on one of these orders. I have to convert to Auto-Cad to get it into our plot queue. This step is kind of labor-intensive and redundant. I use Eagle's DXF ulp, then tweak it by hand in AutoCad. If you want the Auto-Cad file for the fraktal synth, you can have it.
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akorbeti



Joined: Oct 30, 2008
Posts: 22
Location: Greece

PostPosted: Mon Nov 03, 2008 3:24 pm    Post subject: babyBotte repackaged Reply with quote  Mark this post and the followings unread

Hi there again,

I just made a new shell for the fraktalSynth I posted about above.
The name still remains babyBotte because I liked it so much.
Its shelter now is an IKEA container which I processed accordingly.
The panel was made on photographic paper and was stuck on the lid.
The knob's background is color coded . Green for function, yellow
shades for parameters, red for output (volume/filter). The main
pushbutton is the top right so while pressing this with your left
thumb, you can use the same thumb to press another key.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

and a small description at http://synth-diy.blogspot.com/2008/11/babybotte-repackaged.html

For more shots there is always the pool.
http://picasaweb.google.gr/akorbeti/DiySynth#

(BTW Should I move to flickr?)

Now it is VERY easy to play with it because it has a very solid
feeling. I might make a video sometime..

Thanks again for the synth catweazle..
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hanley



Joined: May 24, 2006
Posts: 27
Location: London

PostPosted: Wed Nov 05, 2008 4:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

okvern wrote:

Attached files:

PICSynthBoards.zip: The main board and filter board, as 600ppi bilevel TIFFs. You'll need to look at the Eagle layouts for parts placement.


hey okvern
does your pcb image work off catweasles schematic or is it changed a bit?
my breadboarded picsynth is on its last legs so doin up a pcb for it

cheers


edit: nevermind, found the eagle file of the board

thanks
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yerpa58



Joined: Mar 08, 2008
Posts: 56
Location: Wisconsin
Audio files: 4

PostPosted: Sat Dec 06, 2008 12:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hello peoples

I added a plucked-string preset to the fraktal synth. Still having fun with this one. Code and sample at http://www.reprolabs.com/fs7.htm.

santa
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nofrets



Joined: May 10, 2008
Posts: 27
Location: Hills of West Virginia

PostPosted: Sun Dec 14, 2008 6:39 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi folks -

Any recommendation on what programmer to use to burn this chip? Or, alternately, anyone willing to burn one for me?

Thanks,
Patrick

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oootini



Joined: Oct 15, 2007
Posts: 80
Location: ireland

PostPosted: Sun Dec 14, 2008 10:29 am    Post subject: Reply with quote  Mark this post and the followings unread

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nofrets



Joined: May 10, 2008
Posts: 27
Location: Hills of West Virginia

PostPosted: Mon Dec 15, 2008 4:17 am    Post subject: Reply with quote  Mark this post and the followings unread

oootini wrote:
http://cgi.ebay.ie/40-ZIF-USB-9-PIN-Interface-Microchip-PIC-Programmer_W0QQitemZ330294364858QQcmdZViewItemQQptZLH_DefaultDomain_3

will do the trick for ya.


Really? It doesn't say it supports the 18F4620 - are any mods/updates required to make it work?

Patrick

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oootini



Joined: Oct 15, 2007
Posts: 80
Location: ireland

PostPosted: Mon Dec 15, 2008 6:03 am    Post subject: Reply with quote  Mark this post and the followings unread


Last edited by oootini on Mon Dec 15, 2008 10:01 am; edited 1 time in total
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yerpa58



Joined: Mar 08, 2008
Posts: 56
Location: Wisconsin
Audio files: 4

PostPosted: Mon Dec 15, 2008 9:08 am    Post subject: Reply with quote  Mark this post and the followings unread

I've been using an old Microchip Picstart Plus to program the chip. I think there is a lot more this chip can do - this code only uses 4% of the program area. Catweazle's code makes it easy to add more modules. I'd like to add a third control knob function to the plucked strings so that the other two knobs control pitch in more interesting sequences.

I have also been looking through my old copy of Hal Chamberlin's "Musical Applications of Microprocessors" for ideas. Hmmmmm...

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catweazle



Joined: Feb 25, 2008
Posts: 28
Location: germany
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PostPosted: Mon Jan 05, 2009 4:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

First of all happy new year everyone !
I'm impressed about the news going on here. New Algorithm and so on Wink

Maybe it's a bit off-topic but I have some news ...

A Nintendo DS Version of the PIC Fraktal Synth
- in a very very basic alpha state but it makes some noise -

Only one Algorithm (the first one) with 2 Parameters controlled by the
touchscreen. Cool

You need a a flash-card (I use R4DS) and of course a NintendoDS ...

but runs in the No$GBA Emulator too


FraktalSynth_alpha.zip
 Description:
Zip File contain the .nds file

Download
 Filename:  FraktalSynth_alpha.zip
 Filesize:  74.01 KB
 Downloaded:  280 Time(s)

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State Machine
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Joined: Apr 17, 2006
Posts: 2743
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PostPosted: Mon Feb 09, 2009 5:41 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Any recommendation on what programmer to use to burn this chip? Or, alternately, anyone willing to burn one for me?


Sure, PM me .... I just updated my Promate II programmer with the latest firmware so it's good to go to program the 18F4620. Cool I believe the latest Picsynth firmware is at a Ver 1.1 ?? Not sure. PM me with the latest PS "HEX" file and we will work the on the arrangements offline ....

Bill
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catweazle



Joined: Feb 25, 2008
Posts: 28
Location: germany
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PostPosted: Mon Feb 09, 2009 9:34 am    Post subject: Reply with quote  Mark this post and the followings unread

This should be the last (known) Version ...
thanks to yerpa58 who included a new algorithm (very cool stuff!)

http://www.reprolabs.com/picsynth5.zip
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State Machine
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PostPosted: Mon Feb 09, 2009 12:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
This should be the last (known) Version ...
thanks to yerpa58 who included a new algorithm (very cool stuff!)


Nice ... Thanks CAT !!! Wink

Bill
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cthulu



Joined: Feb 07, 2009
Posts: 56
Location: Göteborg, Sweden

PostPosted: Wed Feb 11, 2009 5:09 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks guys. Wonderful project and I just love the sounds... I didn't even need to hear it. I was caught allready by this line:
Quote:
My neighbor came downstairs to see if something was wrong with the washing machine.


Very Happy
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